学界将乾隆盛世衰落之主因归结于乾隆朝日益凸显的三大隐患:人口膨胀、物价持续上涨和皇权过度膨胀。但实际上,其时频仍、严重的灾害,造成了农业经济损失惨重,灾民生命财产安全和基本生存条件缺乏保障;灾害救助使国家财政不堪重负,并在灾民面前充分暴露了吏治的腐败;灾民流离载道,多种形式的反抗斗争连绵不断;等等。天灾严重威胁着乾隆朝的民众生命财产安全、国家粮食安全和财政安全,影响着民心的向背及社会稳定等,引发了多方位和深层次的社会危机,实乃乾隆盛世衰落的主因之一。 The main reason for the decline of the prosperity of Qianlong attributed to the three major hidden dangers of Qianlong Dynasty: the population expansion, the continuous rise of prices and the over-expansion of imperial power. In fact, frequent and serious disasters have caused heavy losses in the agricultural economy, lack of protection for the life and property of the victims and their basic living conditions, disaster relief has overwhelmed the state finance, and fully exposed the corruption of official management in the face of the victims. Live in isolation and endless forms of resistance struggle; and so on. Natural disasters, a serious threat to people's lives and property in Qianlong Dynasty, national food security and financial security, affect the people's back and social stability, triggered a multi-faceted and deep-rooted social crisis, but one of the main reasons for the decline of the Qianlong Prosperity.